Audio Replacer

Swap a video's soundtrack for another audio file, or mix the new audio with the original. The picture is copied without re-encoding when possible. Runs in your browser, nothing is uploaded; long or HD videos take a while. Free, fast, no sign-up required.

How to use Audio Replacer

  1. Open the tool at the top of this page.
  2. Upload your file or enter your text/data.
  3. Click the action button and download your result instantly — no sign-up needed.

About Audio Replacer

Category: Video Tools. Swap a video's soundtrack for another audio file, or mix the new audio with the original. The picture is copied without re-encoding when possible. Runs in your browser, nothing is uploaded; long or HD videos take a while. No account or installation required. Works on any device — Windows, Mac, Android, iPhone.

Free limit: 40 MB per file  ·  Premium limit: 500 MB per file  ·  Files auto-deleted in 1 hour.

Frequently Asked Questions

Is my video uploaded to a server?

Heavy video tools are processed on Toolysite cloud servers and auto-deleted within 1 hour. No data is shared with third parties.

What video formats are supported?

MP4, WebM, MKV, AVI, MOV, GIF and more.

Is there a file size limit?

Free users can upload up to 40 MB per file — more than most competing sites (which cap at 25 MB). Premium users get up to 500 MB.

Is this tool free?

Yes. Toolysite is 100% free to use. No account required.

Do I need to install anything?

No. Everything works online in your browser. No software download needed.

Is my data safe?

Yes. Your files are processed securely, never shared, and automatically deleted within 1 hour.

What is the file upload limit?

Free users can upload up to 40 MB — which is higher than most tools websites. For larger files up to 500 MB, upgrade to Premium.

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